Question

A bus start to move from rest. If its velocity become 90 km per hour after 8 s,Calculate its acceleration

Answer 1

Answer:

volocity=11.25

Explanation:

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Answer 2

Explanation:

given that; speed = 90 km/h

now to convert it into m/s we have to multiply it by 5/18

=>

$90 \times \frac{5}{18}$

=> v=25 m/s

now as the bus started from rest, initial velocity is 0 m/s

=> u=0 m/s

and time taken by bus to come on it's final velocity was 8 sec.

=> t= 8 s

now we know that;

$a = \frac{v - u}{t}$

so here,

$a = \frac{25 - 0}{8}$

=> a= 25/8

=> a= 3.125 m/s^2

so acceleration of the bus is

$3.125 \: \frac{m}{ {s}^{2} }$

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